








 Dear all,

I have been trying to fit my data (only right censored) with gumbel distribution using fitdistrplus. I am getting very high standard error. I have been wondering why.
The followings are the outputs:

fit1=fitdistcens(dr0, "gumbel", start=list(a=99, b=0.6), optim.method= "L-BFGS-B", lower = 0.0, upper = Inf)
> summary(fit1)
FITTING OF THE DISTRIBUTION ' gumbel ' BY MAXIMUM LIKELIHOOD ON CENSORED DATA 
PARAMETERS
    estimate Std. Error
a 97.8260371    3115.09
b  0.1115094     173.79
Loglikelihood:  -9.749883e-10   AIC:  4   BIC:  21.21178 
Correlation matrix:
           a          b
a  1.0000000 -0.6693773
b -0.6693773  1.0000000
 		 	   		  
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